I think i recived 3 red errors ,after i opened CAVL installation file but i didn't a screenshot to tell you about the errors. In Linux Mint 18 "Sarah" the CAVL file was seen as default as archive but in Linux Mint 17.3 "Rosa" Mate this file was able to be seen as ready to be install. Without CAVL for this OS i felt unsafed and i uninstalled "Sarah" and installed "Rosa" yesterday , to be able to install CAVL . I love CAVL too much . I'm praying and I hope that one day we be able to install CAVL on "Sarah" . Thank you!